Setting the VSS space limiation to the default of 300mb in the OS would deleted the snapshots.
You probably want to open a ticket for this issue.
I tried it, but 300 MB (320MB) does not work.
VSS wil delete the snapshot immediately after creation. The allocation size for that snapshot is above 300MB
5028 1f6c 01/16 10:56:07 141982 Operations Cleaning up shadow copy [V1|FSIDA|<SS>bbac0d8c-e31b-4202-82c5-a59117cedf0e] on client [***]
5028 1f6c 01/16 10:56:07 141982 Operations Shadow clean up successful
This is incorrect. BTW: What is the meaning of "V1|FSIDA|<SS>"?
Entry from an pre SP14 job:
4836 1dbc 01/05 01:23:40 141566 Operations Cleaning up shadow copy [35ea5596-3ab1-4099-8a23-52905f2da8b8] on client [*******]